This JOHN PALSGROVE was in fact John George Palsgrove, b. 1741, oldest surviving son of John George Pfalzgraf, the immigrant to PA in 1732.
If Goerge was born in Wuertemburg in 1741, it was while George, his father, was on a return trip there to conduct some business on behalf of his father-in-law Casper Kamm/Kamp. This George returned to PA in 1741 on the St. Mark.The extant record of people on this ship does not include the names of wives or children.So if your John's (John George) mother was on board, she is not named.
We have no proof that George the immigrant (your John's father) was from Wuertemburg, but we do have evidence that the Kamm/Kamp family was from Wuertemmburg.
It happens so very often that descendents do not list the names of all the children of a certain ancestor.This sometimes occurs when the mother of one group is different from the mother of an earlier group. This is why I believe your list is different than that of others.However it is only different in that it does not include all the others.
The names you have and dates are the same as those that other people have supplied, so they must have been by a 2nd, or even 3rd wife, they are on the freepages website and perhaps even somewhere in this forum or the forums at ancestry.com.
We are dealing with one family here and not two different families.
Perhaps your John (John George) was born in Wuertemburg.This would only mean you have supplied another very relevant piece of information for the whole family picture.It would not mean that there was a quite different Palsgrove family in PA, first in Philadelphia Co, then to Berks and Oley.
All this has already been explained at the freepages website, which at present, is the most comprehensive repository of factual information to date.